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    • Experimental Investigation on the Influence of DOC on Diesel Engine Particle Emission
    DOI：
    Key Words:DOC  diesel particulate  particle number concentration  SOF concentration  intrinsic activation energy
    Author NameAffiliation
    MENG Zhongwei，ZHANG Chuan，LI Lu，ZHANG Wenqiang，CHEN Chao Vehicle Measurement， Control and Safety Key Laboratory of Sichuan Province， School of Automotive and Transportation， Xihua University， Chengdu 610039， China 
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    Abstract:Based on diesel engine bench test， a DOC device was added on a diesel engine to analyze the particle number concentration and the variation trend of both SOF content and activation energy of particles before and after the DOC device. Results show that the DOC device can reduce the nucleation mode particle number concentration and the accumulation mode particle number concentration， but with the increase of torque， the DOC device will increase the accumulation mode particle number concentration. The effect of DOC on the total particle number concentration shows a trend of decreasing first and then increasing with the increase of torque. The DOC device can reduce the content of SOF component and increase the apparent oxidation activation energy of particles under the conditions of torque of 50 N·m and 100 N·m. In addition， the apparent oxidation activation energy of exhaust particles shows a decreasing trend as a whole with the increase of SOF content.
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